Something doesn't look right there.How does it compare to the other side?
I believe the BRB goes on top of the washers and then should automatically sit above the wing stay; but your washers don't look right.
Be aware also that the threads on top of the king pin are very fine and are not easy to catch when replacing the top nut. Could it be that someone in the past has messed up here? Hope not.
Thinking back to previous posts on BRBs a few years back, I seem to recall there was quite a discussion on exactly where the bars should go either above or below washers. Others will no doubt come along soon with more expertise.